Removable innersole for boots or shoes



Patented Aug. 31, 1926.

1 istitu are r orties.

UNITED stares OLOlE` BERNHARD DAHLQVST, OF HUDIKSVALL, SWEDEN, ASSIGNORGF ONE-HALF TO :PER ERIK WIKLANDEE, OE HUDIKSVALL, SWEDEN.

REMOVABLE INNERSOLE FOR BOOTS OR SHOES.

Application filed March 1,3, 1925, Serial No. 15,216, and in Sweden May9, 1922.

The present invention refers to an innersole for insertion into boots orshoes, this innersole being composed ot' three superimposed layers otmaterials, the uppermost,

level layer being provided with comparativelysmall holes, distributedover the whole surface and the bottom layer being compact or solid. Thecharacteristics oi' this invention consist in the intermediate layeralso being level and provided with larger holesA` located aboutcoaxially below the holes in the top layer, their boundary walls withthe loivermost layer as a. bottom Jforming cells distributed over theentire sole` these cells 'being closed with the exception of the smallholes in the top layer, By this means the advantage is gained that thesecells form an air receptacle or air space into which thek transpirationJfrom` the toot is drawn through the smaller vents in the top layer. Theair receptacles created by this mea-ns are not interconnected. Thebottom layer, which is not provided with any holes, insulates the footfrom cold and damp in the sole of the boot or shoe.

@n the accompanying drawing is shown only by way ot an example aninnersole for boots or shoes constructed according` tothe presentinvention, in Fig. l in vertical longitudinal section, in Fig. 2 seenYfrom the top and in Fig'. 3 seen from below. Fig. 4 shows a detail ot afastener.

The innersole shown is composed of a level, upper layer l which over itsentire surface is provided with small perforations 2, which are placedclose to each other and mayv be round, oval or of any other shape, a.level intermediate layer 3, provided with larger perliorations 5,coaxially located beloiv the holes 2,Y and which may be round, oval orot' any other shape, as well as a level, compact or dense bottom layer 6without any holes. The three 'layers l, 3 and 6 are similar in outline.l

All parts are made of waterproof material, e. g. of libresl treated withsome celluloid solutions such as dermatoid, pegamoid, granitol etc. orsome other suitable material. Each oneof the layers 1 and 6 may consistof two layers secured together by means of waterproof cement or glue,while the layer 3 may consist ot three layers secured below theperlorations in the top layer and together in the same manner forobtaining suilicient and necessary space in the pertcrations 5 forming'the receptacles. All the layers 1, 3 and 6 may also be of singlematerial ot various thicknesses in the said order.

In theV example shown the top, intermediate and bottom layers are heldtogether by means of fasteners 7 placed in such spots where. there is nopressure from the toot. 'lhese Afasteners 7 are preferably made ofy somematerial which is not affected by-the transpiration ot the -toot, coldor damp. The fasteners may be easily detachable tor hygienic treatmentof the innersoles and for renewing the parts in the event of wear. il heperforations vfor the fasteners are pret erably provided with aspeciallining. rPhe fasteners may also be attached over the edges olfthe inuersoles in order to enable them to be more easily taken apart.The innersole may also be held together in some other way thanbyfasteners and the )arts may in certain cases be left unsecured to eachother. rlfhe edges the holes and the treads, as well as the edges of theinnersole may be reinforced by impregnating' or painting them with aCelluloid solution, e. by innnersing the parts of the innersole in theCelluloid solution. The layers l, Eend 6 may be used separately ifdesired.

l claim A removable innersole for boots,'comprising three iiat layers otcompact material disposed in superposed relation, said layers beingladapted to be separated one from the other, the bottom layer beingsolid, the top layer provided with comparatively small peritorationsforming` vents distributed over the entire layer, and the intermediatelayer provided with larger pertorations disposed coaxial therewith, theboundary walls of said larger peri'forations -forming withv the bottonilayer a seriesl ol cells distributed over the entire composite sole,said cells being closed with exception of the small vents in the toplayer.

ln testimony whereof l have signed my name to this specification. i

@LOF BERNHARD QAHLQVIST,

